Search Results - "borehole"
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The Application of Borehole Hydrophone Arrays in Hardrock Environments
Published 2014“…Hence the main objective of the research presented here is to look into alternative ways of implementing VSP surveys that are cost effective, readily implementable in slim holes and pose lower risk to equipment in unstable uncased mineral exploration boreholes. As shown in this work, these objectives have been met using a borehole hydrophone array. …”
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Borehole Hydrophone Aquisition - Some pitfalls and solutions
Published 2011“…The passive hydraulic coupling and suspension within the water column employed by the hydrophones lead to specific acquisition issues due to noise sources related to cable and borehole seismic modes. With the use of a 24 channel hydrophone string, over several surveys in predominately mineral exploration boreholes, we have investigated suppression of these noise sources. …”
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Borehole seismic methods in high permeability sandstone
Published 2014“…In this research complex field borehole seismic measurements are made at a range of frequencies in weakly-consolidated, high-permeability sandstones. …”
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Borehole inclination effects to the wellbore stability and sand production
Published 1995“…The result shows that the perforated wellbore may fail during the creation process and sand particles were produced, depending on the borehole inclination angle, phasing angle and perforation pattern. …”
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Qualifying stress direction from borehole shear sonic anisotropy
Published 2015“…Shear sonic anisotropy is often able to identify horizontal stress imbalance where borehole failure has yet not occurred. Herein, we review the methodology to determine stress direction on the basis of dipole borehole sonic data, including examination of the effect of hole ovality. …”
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Continuous borehole seismic monitoring of a carbon dioxide storage
Published 2023“…This thesis is focused on advancing borehole seismic techniques for monitoring CO2 stored underground. …”
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Experimental Investigation of Hydraulic Fracturing in Vertical and Horizontal Perforated Boreholes
Published 2013“…Furthermore, it was found that stress anisotropy influences the fracturing mechanism in a perforated borehole, and affects the geometry of the fracture close to the wellbore.…”
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Feasibility of borehole reflection seismology for hard rock mineral exploration
Published 2010“…Through full waveform synthetic modeling, borehole reflection seismology has been tested inthese environments with borehole geometries typical of hard rock exploration techniques. …”
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New scintillators and method for spectral gamma logging in slim boreholes
Published 2015“…Wide-spread application of spectral gamma ray logging system in mineral exploration has not really developed in the geotechnical, environmental-groundwater, and mining industries, but. A new approach to borehole logging by the Deep Exploration and Technologies Commonwealth Research Centre (DET CRC) has created a Logging-While-Drilling tool, the shuttle, to measure natural gamma ray activity during the drilling process. …”
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Estimation of P-wave velocity from other borehole data
Published 2016“…Our method was tested on a dataset from the Kevitsa Ni-Cu-PGE deposit in northern Finland. The borehole data comprises P-wave velocity, density, natural gamma, magnetic susceptibility, resistivity and assay data of Ni of six boreholes. …”
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Experimental Study of Cuttings Transport in Coiled Tube Micro-Borehole Drilling
Published 2018“…This research presented an experimental study of the cuttings transport in vertical micro boreholes. The cuttings settling and transport velocities were obtained under various conditions of cuttings (size, concentration) and fluid properties (flow rate, rheology) and annulus geometry. …”
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Improvement of Borehole Seismic Data Quality Control and Assessment by Statistical Approach
Published 2020“…Borehole seismic data quality control is currently done by visual inspection; it increases acquisition time and ultimately leads to lost revenue for the client. …”
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Modelling borehole wave signatures in elastic and poroelastic media with spectral method
Published 2009Subjects: “…fluid-filled boreholes…”
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